Proportional feed device for filters.



F. B. LEOPOLD.

PROPORTIONAL FEED DEVICE FOR FILTERS.

APPLICATION FILED FEB. 27. 1911.

1,175,067. PatentedMar. 14,1916.

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F. B. LEOPOLD.

PROPORTIONALFEED DEVICE FOR FILTERS.

APPLICATION FILED FEB. 27, \911.

1,175,067. Patented Mar. 14,1916.

2 SHEETSSHEET 2- WITNESSES.

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FREDERICK B. LEOPOLD, OF SEWICKLEY, PENNSYLVANIA.

PROPORTIONAL FEED DEVICE FOR FILTERS.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application filed. February 27, 1911. Serial No. 611,176.

To all whom it may concern: 7

Be it known that I, FREDERICK B. LEO- roLn, a citizen of the UnitedStates, resident of .Sewickley, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in ProportionalFeed Devices for Filters; and I do hereby declare the following to be afull, clear, and exact description thereof.

My invention relates to proportional feed devices for fluids such as forcontrolling the supply of coagulant to the coagulating basin in filtersso that the amount of coagulant fed to said basin will be in properproportion to the amount of water going into said basin.

The object of my invention is to provide a feed device of this characterin which the amount of coagulant fed to the coagulating .basin will beaccurately proportioned to the amount of water going to the basin, thedevice working automatically and when once properly set requiring nofurther attention.

To these ends my invention comprises the novel features hereinafter setforth and claimed.

In the drawings Figure 1 is a plan view of a portion of a filter showingmy proportional feed device in diagrammatic form applied thereto; Fig. 2is a section on the line 2-2 Fig. 1; Fig. 3 is an enlarged verticalsection of my improved feed device on the line 3-3 Fig. l; and Fig. 4 isa section on the line 44 Fig. 1.

In the drawings I have illustrated my invention in connection with anordinary filter in which the numeral 2 is the sedimentation basin, 3-isthe tank for the mixing of the raw water and coagulant, and 4 is theinlet controlling chamber to which the raw water is fed by means of thepipe 5. This chamber 4 has the orifice valve 6 leading into the mixingchamber 3.

The chambers 7 and 8 contain the ingredients composing the coagulant andsaid chambers are provided with the valve controlled outlets 9 and 10.The tank 11 has the inlet 12 at the bottom thereof which is connected upby the pipe 13 to the chamber 4. A float 14 is contained within the tank11, said float having the feet 15 which are adapted to rest on thebottom of the tank when the float is at its lowest position so that theinlet 12 will not be closed by said float. The tank 11 is provided withthe guides 16 which are engaged by the guidelugs 17 on the float 14 toprevent the rotation said pinion 29.

of said float and guide it accurately up and down within the tank 11. Aclevis 18 is secured to the float 14 and connected to said clevis is thesprocket-chain 19. This chain 19 passes up through the casing 20 andover the sprocket-wheel 21 journaled in the bearing 22 at the upper endof the casing 20. The weight 23 is secured to the free end of thesprocket-chain 19.

The shaft 24 is connected to the sprocketwheel 21 and said shaft carriesthe gearwheel 25 which meshes with the pinion 26 on the shaft 27. Thisshaft 27 carries the bevel-gear 28 which meshes with the bevelpinion 29on the vertically movable stem 30. The stem 30 is square in crosssection at its .upper end where it is engaged by the pinion 29 and ismovable up and down for a certain distance on said square portion movingin The stem 30 is contained within the tank31 and a float 32 is carriedby the stem 30, said float engaging the threaded portion 33 of saidstem. The float 32 is adapted to move up and down on the stem 30 but isheld against rotary movement by the cleats 34 which act to guide saidfloat in its vertical movement. The rollers 35 are carried by the floatand engage the inner walls of the tank to prevent the float from bindingon the sides of same.

The lower end of the stem 30 carries the valve 36 working in thevalve-chamber 38. The inlet chamber 39 has the inlet 40 whichcommunicates with the pipes 9 and 10 leading from the coagulantsupply-chamber 7 and 8. The bottom of this inlet chamber 39 is inclinedas at 41 to provide for the draining of said chamber through the draintap 42. The tank 31 is provided with the outlet 43 controlled by asuitable valve 43 which delivers into the funnel 44. This funnel 44 isconnected with the pipe 45 which enters the mixing tank 3 at 46.

When my invention is in use in connection with the filter its operationis as follows: The supply of coagulant is permitted to pass from thetanks 7 and 8 through the pipes 9 and 10 into the inlet chamber 39 andat the same time water is flowing into the reservoir 4. Theinlet-control chamber 4 acts as a gage for the sedimentation chamber andthe head in the chamber 4 is designed to pass a certain given quantityof water through the orifice valve 6 into mixing chamber 3. Accordinglyas the head increases or diminishes in the chamber 4 the float 14 in thetank 11 will rise and fall.

The sprocket-chain 19 and the connections I therefrom with the pinion 29will 'act to turn the stem 30 and this turning of the stem 30 with thefloat 32 held against rotary movement will cause the-float 32 to beraised and lowered on the stem 30-to correspond to the changed level inthe tank 11. But indee pendent of this movement said float 32 will ,riseand fall according to the amount of.

. tank 3.

The inlet controlling valve 36 is abalanced valve and, when float 32 hasbeen set i at its relative height by the operating mechanism of float14;, the independent vertical movement or" float 32 controls the supplyof solution through the valve 36. As the head in the solution tanks 7and 8 decreases,

owing to the consumption of the solution,

the opening through the valve 36 must be increased in order to supplythe orifice e3 with the same or practically the same'uniform rate offlow and the vertical moveinent of the valve stem through the opening inthespinion 29 is intended to provide the adjustment necessary for thecontrol of this solution in its flow to the tank 31 to maintainapractically proportional head of discharge over the orifice outlet 43,through the mechanical operation of the float 14, sprocket wheels, etc.No matter at what elevation the coagulant in the tank 7 and 8 stands aslong as the coagulant of said tanks and 8 is higherthan the coagulant intank 31, the operation oi float 32 automatically increases or decreasesorifices 38 to maintain a practicallv proportional head in the tank 31.The flow through orifice (3 in tank 1 and outlet 43 in tank 31 is thuspractically proportional, minus, of course, the slightest difference inthe efliciency of discharge of the two different sized orifices, whichis immaterial, sofar as practical results are concerned. The lowestsolution level in tanks 7 and 8 must be, of course,

at a height above the highest solution level in the tank 31 in order tomake available for use the full amount of solution contained therein. 7

\Vhat I claim is: 7 I

1. In a proportional feed device for fluids, the combination of a tank,a float therein, connections between said tankand a fluid supply, asecond tank having an inlet and outlet, a float therein, connectionsbetween said tank and a second fluid supply, a valve controlling theinlet of said second tank,

connections between said valve and said last named float, and means forraising and lowering the position of said second float by the movementof said first float.

2. In a proportional feed device for fluids, the combination of a tank,afloat therein, connections between said tankand a fluid supply, asecond tank having an inlet and v outlet, connections between saidsecond tank and a second fluid supply, a' vertically movable stem insaid tank, a valve on said stem controlling said inlet, a float on saidstem, and means for raising and lowering said float on said stem by themovement of said first named float.

3. In a proportional feed device for fluids, the combination of a tank,a float therein,

connections between'said tank and a fluid supply, a second tankhaving aninlet and outlet, connections between said second tank and a secondfluid supply, a vertically movable threaded stem in said second tank, a

valve connected to said stem controlling said inlet, a non-rotary floatengaging said stem, and means for turning said stem by the movement ofsaid first namedfloat.

1. In a proportional feed device for fluids,

the combination o-f a tank, a float contained therein, connectlonsbetween said tank and a fluid supply, a second tank having an in let andoutlet, connections between said second tank and a second fluid supply,a vertically movable stem in said second tank, a

valve carried by said stem controlling said inlet, a non-rotary floatthreaded on said stem, a pinion on said stem through which said stem isvertically movable, and connections between said pinion and said firstnamed float for turning said pinion by the movement of said first namedfloat.

" 5. In a proportional feed device for fluids, the combination of atank, a float therein, connections between said tank and a fluid supply,a second tank having an inlet and outlet, connections between saidsecond tank and a second fluid 'supplv, a vertically movable stem insaid second'tank, a valveconnected to said stem controlling said inlet,a

ERICK B. Lnoronn have hereunto set my hand.

FEEDER-10KB. LEOP OL D.

Witnesses:

RoB'r; D. Tor'rmv, ALVAR C. PURDY,

Copies of this patent may be obtained 'forfive cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

